UM0673 User manual. STEVAL-ISF001V1, 3 kw FOT PFC board based on the L6563. Introduction

Transcription

1 User manual STEVAL-ISF001V1, 3 kw FOT PFC board based on the L6563 Introduction Note: The power board STEVAL-ISF001V1 is a 3 kw PFC designed for industrial and domestic applications. The board must be used for demonstration purposes in order to evaluate the potential of the FOT (fixed-off-time control, patented by ST) to implement a high-power PFC with performance comparable to a standard continuous-mode PFC, but using a simpler controller chip originally designed for TM (transition-mode) PFC operating conditions. This demonstration board works directly from the AC mains supply in the single range voltage (185 Vrms Vrms) and provides a 400 V stable and regulated DC bus output capable of a maximum of 7.5 A. The low voltage necessary to supply the driver is generated by an auxiliary winding on the main inductor, so an external power supply is not needed to start the operation of the board. The design is: quick to set up and install re-usable (the Gerber files are available for free) ready for downsizing if required. Please read Section 2 of this manual before attempting any operation. Figure 1. Line, inductor, switch and diode current in FF-CCM PFC Figure 2. Line, inductor, switch and diode current in TM PFC AM01972v1 AM01980v1 September 2009 Doc ID Rev 1 1/20

2 Contents UM0673 Contents 1 Board description Safety and operating instructions General Power board 3 kw FOT PFC intended use Power board 3 kw FOT PFC installation Electronic connection kw FOT PFC demonstration board setup Hardware layout Environmental considerations PFC board connection STEVAL-ISF001V1 description STEVAL-ISF001V1 circuit description BOM and schematics Experimental measurements Revision history /20 Doc ID Rev 1

3 List of figures List of figures Figure 1. Line, inductor, switch and diode current in FF-CCM PFC Figure 2. Line, inductor, switch and diode current in TM PFC Figure 3. STEVAL-ISF001V1 demonstration board Figure 4. Power board 3 kw FOT PFC STEVAL-ISF001V1 (top view) Figure 5. Schematic of the STEVAL-ISF001V1 board Figure 6. Common-mode inductor L1 (MAGNETICA ) technical sheet Figure 7. Common-mode inductor L2 (MAGNETICA ) technical sheet Figure 8. Common-mode inductor L3 (MAGNETICA ) technical sheet Figure 9. Boost inductor with auxiliary winding, T1 (MAGNETICA ) technical sheet Doc ID Rev 1 3/20

4 Board description UM Board description The STEVAL-ISF001V1 can be used for several kinds of applications: Inverter for motor control Air conditioning system Welding machine DC power supply section. This demonstration board offers customization options as well, making it an excellent choice as an original platform for a more complete and dedicated system. Special care has been taken during the layout process to provide a very low level of interference. Considering the power delivered and the level of current present on the board, we advise no major modification of the layout for customization of the system in order to avoid noise that could cause the board to malfunction. The board includes: An input stage composed of a 25 A power rectifier bridge An input filter stage necessary to comply with the EMC emission levels A control stage composed of the L6563 A power stage composed of a Power MOSFET and power ultra-fast diodes A power inductor designed and manufactured specifically for this application An output filter stage composed of an electrolytic capacitor sized to have the ripple required by the specification. Figure 3. STEVAL-ISF001V1 demonstration board 4/20 Doc ID Rev 1

5 Safety and operating instructions 2 Safety and operating instructions 2.1 General During assembly and operation the 3 kw FOT PFC board poses several inherent hazards including bare wires and hot surfaces. If the board or its components are improperly used or installed incorrectly, there is danger of serious personal injury and damage to property. All operations involving transportation, installation and use, as well as maintenance is to be carried out by skilled technical personnel (national accident prevention rules must be observed). For the purposes of these basic safety instructions, "skilled technical personnel" are suitably qualified people who are familiar with the installation, use, and maintenance of power electronic systems. Warning: Many sources of serious hazard are present on this board. The board works directly from the mains, is not galvanically isolated, and provides on the output high-voltage DC levels that can be the cause of serious electrical shock, serious burns or death. Hot surfaces that can cause burns are present on the board. This board must be used only in a power laboratory only by engineers and technicians who are experienced in power electronics technology and under protection. STMicroelectronics is not responsible for damages to property nor personal injury Power board 3 kw FOT PFC intended use The power board 3 kw FOT PFC is designed for demonstration purposes only and shall not be used for electrical installation or machinery. The technical data as well as information concerning the supply conditions shall be taken from the documentation and strictly observed. 2.2 Power board 3 kw FOT PFC installation The installation and cooling of the 3 kw FOT PFC shall be in accordance with the specifications and the targeted application (see Section 2.2.2). Excessive strain on the board shall be avoided. In particular, no components are to be bent or isolating distances altered during the course of transportation or handling. No contact shall be made with electronic components and contacts. The boards contain electrostatically-sensitive components that are prone to damage through improper use. Electrical components must not be mechanically damaged or destroyed (to avoid potential health risks). Doc ID Rev 1 5/20

6 Safety and operating instructions UM Electronic connection National accident prevention rules must be followed when working on the main power supply, with the power supply, or powering the board in general. The electrical installation shall be completed in accordance with the appropriate requirements (e.g., cross-sectional areas of conductors, fusing, PE connections. For further information, see Section 2.2.2) kw FOT PFC demonstration board setup Caution: It is preferable to use an AC supply isolated and protected against overload and short-circuit during the evaluation test of the power board 3 kw FOT PFC (in compliance with technical equipment and accident prevention rules). A proper load, able to dissipate or in any case absorb and reuse the power delivered by the system, has to be used. In the case of a resistive and dissipative dummy load, the user must pay attention to the temperature that the load could reach and provide the necessary equipment to avoid hot surfaces and fire hazards during the tests (fan, water-cooled load, etc). Do not touch the boards and its components after disconnection from the voltage supply, as several parts and power terminals which contain possibly energized capacitors need to be allowed to discharge. 2.3 Hardware layout Figure 4. Power board 3 kw FOT PFC STEVAL-ISF001V1 (top view) The mains input connector is present on the right side of the board. Connect a sinusoidal supply voltage with amplitude in the range of 185 Vrms to 265 Vrms. The power source has to be able to supply the power required by the system, according to the output load the user intends to connect on the output port. 6/20 Doc ID Rev 1

7 Safety and operating instructions The output connector is present on the left side (close to the output electrolytic capacitors). Please note that the output voltage is regulated by the system for the target value of 400 V (consider a tolerance of 5%, due to the net value of the passive components on the board), which gives a value for a resistive load between 530 Ω ( minimum power delivered) to 53 Ω ( maximum power delivered). Warning: The STEVAL-ISF001V1 has no insulation shield or any other type of protection. Caution: Note: Note: The demonstration board must be handled very carefully, as high-potential (energy) parts are open and can be touched. The user MUST avoid connecting or removing cables during operation of the board or touching any part of the system when it is connected to the main power supply. After turning the power supply off, if the load is disconnected, the DC-link capacitor may still hold voltage. It is preferable to test the kit in ambient temperature not higher than 45 degrees Celsius. 2.4 Environmental considerations Note: Note: The STEVAL-ISF001V1 must only be used in a power laboratory. The high voltage involved in the system presents a serious shock hazard. If the board is to be used to measure or capture waveforms or any other interaction between the board and laboratory equipment, an AC-isolated power supply has to be used. Any measurement equipment must be isolated from the main power supply before powering up the PFC. To use an oscilloscope with the kit, it is safer to isolate the AC supply AND the oscilloscope or use isolated differential probes. This prevents a shock from occurring as a result of touching any SINGLE point in the circuit but does NOT prevent shocks when touching TWO or MORE points in the circuit. An isolated AC power supply can be constructed using an isolation transformer and a variable transformer. Isolating the application rather than the oscilloscope is highly recommended in any case. Doc ID Rev 1 7/20

8 PFC board connection UM PFC board connection Note: Caution: Note: The PFC board is manufactured ready to use. Using jumper J3, the supply of the driver L6563 can be connected directly to the supply generated by the auxiliary winding present on the boost inductor or to an isolated low-voltage external supply. This option can be used to debug or to test an inductor not equipped with an auxiliary winding. Set jumper J3 to position 2-3 to use the standard auxiliary power supply already present on the board. If an external supply is used, set J3 to position 1-2 and connect a 15 V DC supply capable of at least 100 ma to J4 (+15 on J4 pin1, ground on J4 pin2). Connect the board to the AC power supply. Use a suitable cable, in terms of insulation and cross-section, to be able to conduct the current from the supply according to the load connected to the output port. Connect the output port to the load. Even if the system is able to start up and maintain the output voltage regulated to the target value, also under open-load condition, the technical specification in terms of PF and THD cannot be guaranteed. The systems accept a minimum power load to work properly. Supply the PFC board with a sinusoidal supply voltage with amplitude in the range of 185 Vrms to 265 Vrms. The power source has to be able to supply the power required by the system, according to the output load the user intends to connect to the output port. Do not supply the system with a voltage value higher than 265 Vrms, as risk of serious damage to the board and to property is present in this case. Do not supply the system with a voltage below the minimum allowed, 185 Vrms, as the systems cannot start or operate properly in this condition. Low voltage supply and maximum output load present the worst operating conditions for the system and sufficient cooling is mandatory. 3.1 STEVAL-ISF001V1 description The demonstration board STEVAL-ISF001V1 developed by STMicroelectronics provides a compact, and ready-to-use solution for the implementation of a simple PFC system able to supply load with power close to the maximum delivered in most typical domestic installations. For such a range of power the use of a continuous-mode PFC operation becomes mandatory to drain from the mains a current with an rms value which does not exceed the maximum allowed from the metering system and to have a reasonable size of the devices involved in the system s operations. The use of a standard continuous-mode driver chip necessitates using a more expensive and complex driver with all the required passive components. STMicroelectronics has patented a solution that allows using a simple driver, designed for a transition-mode operation, in a fixed-off-time, variable frequency, PWM modulation. This kind of modulation gives a current on the boost inductor of the PFC that is comparable with the current of a typical continuous-mode modulation. Modulating T ON and fixing T OFF of the PWM signal applied to the main switch, it is possible to maintain continuous current on the inductor around a sinusoidal envelope. As a 8/20 Doc ID Rev 1

9 PFC board connection consequence of maintaining constant T OFF and varying T ON, the overall PWM period is modulated which gives a variable frequency control. Using a variable frequency control has advantages in terms of noise input filter size. In fact, the noise energy is spread over a frequency range with lower energy content for each frequency. For further technical information and correct sizing and calculation of the device on the board, please consult STMicroelectronics AN1792 "Design of fixed-off-time-controlled PFC pre-regulators with the L6562". The features of the STEVALISF001V1 include: PFC FOT power systems based on the L6563 Power stage based on MDmesh II Power MOSFET 185 Vrms < Vin rms <265 Vrms Vout 400 V regulated (±5%) Iout max 7.5 A Driver with inductor saturation detection Optimized EMC input filter. 3.2 STEVAL-ISF001V1 circuit description Figure 5 shows the entire electronic schematic. Starting from the input section, a common-mode EMC filter is fitted in order to be compliant with the EMC regulations concerning industrial and domestic applications. (EN55014 and EN55022). The alternative voltage from the mains is then rectified by the input low-frequency bridge that provides a rectified sinusoidal waveform (with a frequency that is doubled with respect to the input main waveform) to the next boost stage. The capacitor C7 has been calculated to have a residual ripple, around the sinusoidal envelope at maximum load and minimum input voltage, of 6% of the Vin peak value. The main boost inductor, designed and produced by MAGNETICA (Italy), is a ferrite inductor core designed to minimize the hysteresis losses. The technical sheet with a complete order code is given in Figure 6. The inductor has a secondary-side winding that provides the low-voltage auxiliary supply to the driver L6563. At the startup the current and voltage on the main inductor is still zero, so any voltage can be generated by the secondary auxiliary winding. In this condition, and only during the startup, the two resistors R7 and R13, 150 kω each, with the Zener diode D4 (fitted for limitation purposes) charge the capacitor C12 and supply the driver that starts the PWM operation. As soon the PWM signal starts to switch, a voltage is present across the auxiliary winding, so the low supply voltage across the capacitor C12 is maintained. The two boost diodes paralleled conduct the peak inductor current at the end of the T ON period. At the maximum power and minimum input voltage the peak current can reach 29 A. Diode D2 and NTC resistor NV1 are used to limit the inrush current, due to the electrolytic capacitor on the output, during the startup or small decrease of the mains. Doc ID Rev 1 9/20

10 PFC board connection UM0673 The chosen switching devices are two Power MOSFETs, MDmesh II family, STW55NM60N. These two Power MOSFETs placed in parallel assure a low R DS(on), limiting the conduction power losses. Good efficiency and good thermal behavior of the system can be reached. In order to properly drive the two Power MOSFETs and to minimize switching losses, during the on and off transient, a small push-pull driver was interposed between the driver and the two gates. A reading of the current conducted by the two Power MOSFETs, equal to the current on the main inductor during the T ON period, is necessary for the driver to set the right current level on the inductor according to the input instantaneous voltage and the output power delivered to the load. This current is sensed by a sensing resistor paralleling two 0,07 Ω non-inductive sensing resistors. The output DC bus voltage is sensed by the driver through the resistive net composed of R12, R16, R17, and R24. As described in the L6563 datasheet, a PFC pre-regulator output voltage monitoring/disable function exists. This pin senses the output voltage of the PFC preregulator through a resistor divider and is used for protection purposes. If the voltage at the pin exceeds 2.5 V, the IC is shut down, its consumption goes almost to the startup level and this condition is latched. The PWM_LATCH pin is asserted high. Normal operation can be resumed only by cycling Vcc. This function is used for protection in case the feedback loop fails. The RC net, on pin ZCD, is used to fix the desired T OFF time according to the sizing calculation of the application (for complete design rules, please refer to "Design of fixed-offtime-controlled PFC pre-regulators with the L6562"). The small signal bit Q3 is used to implement a T OFF modulation according to the input voltage. At the moment of low voltage on the input waveform (near the zero-crossing of the input sinusoidal supply) and in order to minimize the distortion on the input current due to the low input voltage, the T OFF period needs to be reduced. Acting in this way, the ratio between T ON and T OFF is increased and the distortion on the input current can be reduced. 10/20 Doc ID Rev 1

11 BOM and schematics 4 BOM and schematics Table 1. Bill of material Item Qty Reference Part 1 1 C µf 300Vac X2 2 2 C2,C4 10 nf Y2 3 1 C3 2.2 µf 300Vac X2 4 1 C7 220 nf 630 V 5 2 C6,C8 330 µf 450 V 6 1 C9 18 nf 7 1 C10 1µF 8 1 C nf 9 1 C nf 50 V 10 1 C12 47 µf 50 V 11 1 C pf 12 1 C nf 13 1 C18 10 nf 14 1 C nf 15 1 C nf 16 1 C nf 17 1 D1 25 A 220 AC diode bridge 18 1 D2 1N D3,D17 STTH12S06 (TO-220) 20 1 D4 30 V Zener 21 4 D5,D7,D8,D9 1N D6 20 V Zener 23 1 F1 Fuse 16 A 24 1 P1 220AC 16 A three-way connector 25 1 P2 OUT/400 V 8 A two-way connector 26 1 P3 20vDC Aux supply stripline 27 1 J1 Jumper stripline 28 1 U2 STS01DTP06 (SMD) 29 1 U1 L6563 (SMD) 30 1 P4 External signal stripline 31 1 L1 MAGNETICA mh 18 A 32 2 Q1,Q2 STW55NM60N (heatsink PADA 8355) Doc ID Rev 1 11/20

12 BOM and schematics UM0673 Table 1. Bill of material (continued) Item Qty Reference Part 33 1 Q3 BC RV1 NTC 1 Ω 26 mm (ex. SIEMENS S464) 35 1 R1 470 kω 1/2 W 36 1 R2 22 Ω 1 W 37 2 R3,R4 560 kω 38 1 R5 120 kω 39 1 R6 10 kω 40 3 R7,R13,R kω 41 1 R8 47 kω 42 3 R9,R10,R kω 43 3 R12,R16,R MΩ 44 1 R14 82 kω 45 1 R15 15 kω 46 1 R18 33 Ω 47 2 R19,R Ω 48 2 R20,R Ω 49 1 R kω 50 2 R24,R29 18 kω 51 1 R kω 52 1 R kω 53 1 R kω 54 2 R30,R Ω 5 W Lob5 non-inductive 55 1 R Ω 56 2 R33,R34 (1) 100 kω 1/2 W 57 1 T1 MAGNETICA L2 MAGNETICA mh 18 A 59 1 L3 MAGNETICA µH 8 A 60 1 V1 Metal oxide varistor 22 mm 275 V 61 1 C nf 630 V 62 1 C µf 630 V 63 1 C14 1 µf (SMD) 64 1 R kω 1/2 W 1. R33 and R34 have to be mounted far from the surface 12/20 Doc ID Rev 1

13 BOM and schematics Figure 5. Schematic of the STEVAL-ISF001V1 board AM01975v1 Doc ID Rev 1 13/20

14 Experimental measurements UM Experimental measurements Table below shows the performance of the PFC board during lab testing. Table 2. Lab preliminary electrical measurements 185 Vac 230 Vac 265 Vac Vout Iout Low-power range Medium-power range High-power range Full load Pout Pin Efficiency (%) 96% 96.5% 96.2% PF Vout Iout Pout Pin Efficiency (%) % 97.3% PF Vout Iout Pout Pin Efficiency (%) 96.7% PF Vout Iout Pout Pin Efficiency (%) 96.9% 96.5% 97% PF /20 Doc ID Rev 1

15 Experimental measurements Figure 6. Common-mode inductor L1 (MAGNETICA ) technical sheet STP 03 Product Technical Specification Code: Product: Common Mode Inductor 2x2mH 18A Customer: STMicroelectronics Customer Code: TYPICAL APPLICATION TECHNICAL DATA DISTURB SUPPRESSION ON AC/DC POWER LINE OF INDUCTANCE (1-4=2-3) 270V MAX. (MEASURE 1KHZ, TA 20 C) SCHEMATIC 1 4 SETUP OF MEASURE mh min RESISTANCE (1-4=2-3) 10mΩ max (MEASURE D.C, TA 20 C) LEAKAGE INDUCTANCE 1 % NOM (MEASURE 1-4 AND 2-3 IN S.C, F 10KHZ, TA 20 C) OPERATING VOLTAGE (F 50-60HZ, IR 18A MAX, TA 20 C) OPERATING CURRENT (MEASURE 1-4 AND 2-3,TA 20 C) OPERATING FREQUENCY (CURRENT 18A MAX, TA 20 C) INSULATION ( ) (F 50HZ, TEST DURATION 2, TA 20 C) OPERATING TEMPERATURE RANGE (IR 18A MAX) MAXIMUM DIMENSIONS WEIGHT 270VAC MAX 18A MAX 50 60HZ 1500V MAX -10 C +45 C 29X26 H46mm 100g CIRCA ATTENUATION COMMON MODE DIFFERENTIAL MODE COMMON MODE uF DIFFERENTIAL MODE uF 3 MAGNETICA AM01976v1 Doc ID Rev 1 15/20

16 Experimental measurements UM0673 Figure 7. Common-mode inductor L2 (MAGNETICA ) technical sheet STP 03 Product Technical Specification Code: Product: Common Mode Inductor 2x220uH/18A Customer: ST Microelectronics Customer Code: TYPICAL APPLICATION TECHNICAL DATA EMC SUPPRESSION ON AC/DC POWER LINE OF 270V INDUCTANCE (1-4=2-3) MAX. (MEASURE 1KHZ, TA 20 C) SCHEMATIC 1 4 SETUP OF MEASURE uH MIN RESISTANCE (1-4=2-3) 8.9mΩ MAX (MEASURE D.C, TA 20 C) LEAKAGE INDUCTANCE 1.2% NOM (MEASURE 1-4; 2-3 IN S.C, F 10KHZ, TA 20 C) OPERATING VOLTAGE 270VAC MAX (F 50-60HZ, IR 18A MAX, TA 20 C) OPERATING CURRENT 18A MAX (MEASURE 1-4 AND 2-3,TA 20 C) OPERATING FREQUENCY 50 60HZ (CURRENT 18A MAX, TA 20 C) INSULATION ( ) (F 50HZ, DURATION TEST 2, TA 20 C) OPERATING AMBIENT TEMPERATURE (IR 18A MAX) MAXIMUM DIMENSIONS WEIGHT 1500V MAX -10 C +45 C 30X34 H32MM 36g APPROX INSERTION LOSS COMMON MODE DIFFERENTIAL MODE COMMON MODE uF DIFFERENTIAL MODE uF 3 MAGNETICA AM01977v1 16/20 Doc ID Rev 1

17 Experimental measurements Figure 8. Common-mode inductor L3 (MAGNETICA ) technical sheet STP 03 Product Technical Specification Code: Product: Common Mode Inductor 2x30uH/8A Customer: STMicroelectronics Customer Code: TYPICAL APPLICATION DISTURB SUPPRESSION ON AC/DC POWER LINE OF 400V MAX. SCHEMATIC 1 4 SETUP OF MEASURE 2 3 TECHNICAL DATA INDUCTANCE (1-4=2-3) (MEASURE 1KHZ, TA 20 C) 30uH min RESISTANCE (1-4=2-3) 7.36mΩ max (MEASURE D.C, TA 20 C) LEAKAGE INDUCTANCE 1 % NOM (MEASURE 1-4 AND 2-3 IN S.C, F 10KHZ, TA 20 C) OPERATING VOLTAGE 400DC MAX (F 50-60HZ, IR 8A MAX, TA 20 C) OPERATING CURRENT (MEASURE 1-4 AND 2-3,TA 20 C) OPERATING FREQUENCY (CURRENT 8A MAX, TA 20 C) INSULATION ( ) (F 50HZ, TEST DURATION 2, TA 20 C) OPERATING TEMPERATURE RANGE (IR 8A MAX) MAXIMUM DIMENSIONS WEIGHT 8 A MAX 50 60HZ 1500V MAX -10 C +45 C 40X21 H40MM 36g APPROX ATTENUATION COMMON MODE DIFFERENTIAL MODE COMMON MODE uF DIFFERENTIAL MODE uF 3 MAGNETICA AM01978v1 Doc ID Rev 1 17/20

18 Experimental measurements UM0673 Figure 9. Boost inductor with auxiliary winding, T1 (MAGNETICA ) technical sheet STP 04 Product Technical Specification Code : Product: PFC Inductor 1.5mH 13A Customer: STMicroelectronics Customer Code: TYPICAL APPLICATION TECHNICAL DATA INDUCTOR FOR BUCK, BOOST AND BUCK-BOOST DC/DC INDUCTANCE CONVERTER, SUITABLE ALSO IN HALF-BRIDGE, PUSH- (MEASURE 1KHZ, TA 20 C) PULL AND FULL-BRIDGE APPLICATIONS PIN 1,2,3-4,5,6 1.5mH ±15% SCHEMATIC PIN uH ±15% RESISTANCE (DC MEASURE, TA 20 C) PIN 1,2,3-4,5,6 100mΩ MAX PIN mΩ MAX OPERATING CURRENT (DC MEASURE, TA 20 C) OPERATING VOLTAGE (F 70KHZ, IR 13A, TA 20 C) SATURATION CURRENT (DC MEASURE, L 35%NOM, TA 20 C) RESONANCE FREQUENCY (TA 20 C) OPERATING AMBIENT TEMPERATURE (IR 13A MAX) MAXIMUM DIMENSIONS WEIGHT 13A MAX 500V MAX 29A MAX 250KHZ NOM -10 C +45 C 75X80 H62mm 820g APPROX INDUCTANCE VS CURRENT 100% L INDUCTANCE VS FREQUENCY L/L(1kHz) 800% 600% 400% 200% 10% I [A] 30 0% f [khz] PIN DESCRIPTION PIN (*) FUNCTION PIN (*) FUNCTION 1 A PFC BOBBIN START 5 B PFC BOBBIN END 2 A PFC BOBBIN START 6 B PFC BOBBIN END 3 A PFC BOBBIN START 7 AUXILIARY BOBBIN START 4 B PFC BOBBIN END 8 AUXILIARY BOBBIN END (*)PIN WITH THE SAME SUBSCRIPT MUST BE CONNECTED TOGETHER ON PCB MAGNETICA AM01979v1 18/20 Doc ID Rev 1

19 Revision history 6 Revision history Table 3. Document revision history Date Revision Changes 24-Sep Initial release. Doc ID Rev 1 19/20

20 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ( ST ) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 20/20 Doc ID Rev 1